[sync] Prevent sessions flare on startup

chrome/browser/sync/sessions/sync_sessions_router_tab_helper.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/sessions/sync_sessions_router_tab_helper.h"
 
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/sync/sessions/sync_sessions_web_contents_router.h"
 #include "components/sync_sessions/synced_tab_delegate.h"
 #include "content/public/browser/navigation_entry.h"
@@ skipping 34 matching lines @@
   NotifyRouter();
 }
 
 void SyncSessionsRouterTabHelper::WebContentsDestroyed() {
   NotifyRouter();
 }
 
 void SyncSessionsRouterTabHelper::DidFinishLoad(
     content::RenderFrameHost* render_frame_host,
     const GURL& validated_url) {
-  NotifyRouter();
+  NotifyRouter(true);
 }
 
 void SyncSessionsRouterTabHelper::DidOpenRequestedURL(
     content::WebContents* new_contents,
     content::RenderFrameHost* source_render_frame_host,
     const GURL& url,
     const content::Referrer& referrer,
     WindowOpenDisposition disposition,
     ui::PageTransition transition,
     bool started_from_context_menu,
     bool renderer_initiated) {
   SessionID::id_type source_tab_id = SessionTabHelper::IdForTab(web_contents());
   if (new_contents &&
       SyncSessionsRouterTabHelper::FromWebContents(new_contents) &&
       new_contents != web_contents() && source_tab_id != kInvalidTabID) {
     SyncSessionsRouterTabHelper::FromWebContents(new_contents)
         ->set_source_tab_id(source_tab_id);
   }
   NotifyRouter();
 }
 
-void SyncSessionsRouterTabHelper::NotifyRouter() {
+void SyncSessionsRouterTabHelper::NotifyRouter(bool page_load_completed) {
   if (router_)
-    router_->NotifyTabModified(web_contents());
+    router_->NotifyTabModified(web_contents(), page_load_completed);
 }
 
 }  // namespace sync_sessions